Consumers have been experiencing issues with defective 8L45 and 8L90 transmissions in Chevrolet, GMC, and Cadillac vehicles. These issues, commonly referred to as the “Chevy Shake,” reportedly cause vehicles to hesitate, shudder, jerk, or “hard shift” when the automatic transmission switches gears during acceleration or deceleration. Drivers have said that this shift is sometimes so violet that they feel as if they were hit by another vehicle. GM has allegedly been aware of the issues with the 8-speed transmissions since 2015, which is the year they began releasing Technical Service Bulletins addressing the issues. These TSBs, however, only offered short-term solutions and did not fix the defective part. The most common example of this is “flushing” the transmission.
The issues with the transmission are said to be caused by the hydraulic system putting stress on the gears and wearing them down, causing metal shavings to become trapped inside the transmission and subsequently causing the component to malfunction. The most common complaints regarding GM’s 8-speed transmission are: shaking, shuddering, jerking, transmission failure, hard up and down shifting, sudden deceleration, stalling while driving, excessive oil consumption, and leaking fluid.
The following vehicles are equipped with the defective 8-speed transmissions:
2014–2019 Chevrolet Silverado
2017–2019 Chevrolet Colorado
2015–2019 Chevrolet Corvette
2016–2019 Chevrolet Camaro
2015 – 2020 Chevrolet Tahoe
2015 -2020 Chevrolet Suburban
2015–2020 Cadillac Escalade
2015–2019 Cadillac Escalade ESV
2016–2019 Cadillac ATS
2016–2019 Cadillac ATS-V
2016–2019 Cadillac CTS
2016–2019 Cadillac CT6
2016–2019 Cadillac CTS-V
2014–2019 GMC Sierra
2015–2020 GMC Yukon
2015 -2020 GMC Yukon XL
2015–2017 GMC Yukon Denali
2014 -2017 GMC Denali XL
2017–2019 GMC Canyon
IF YOU HAVE EXPERIENCED ANY OF THESE PROBLEMS WITH YOUR VEHICLE, CONTACT ME, I CAN HELP YOU! I am a Consumer Law Attorney with over 25 years of experience successfully handling thousands of these types of cases throughout the United States.